FILE
  LSAssignmentExprImpl(ASSIGNMENT_EXPR)
    LSSymbolAssignmentImpl(SYMBOL_ASSIGNMENT)
      PsiElement(IDENTIFIER)('foo')
      PsiWhiteSpace(' ')
      PsiElement(=)('=')
      PsiWhiteSpace(' ')
      LSPrimaryExprImpl(PRIMARY_EXPR)
        PsiElement(INT)('1')
  PsiElement(;)(';')